**Here are 10 examples of using the word «harmful» in English:**
1. It is well known that smoking is harmful to health.
2. The chemicals in this product can be harmful if ingested.
3. Spending too much time on social media can have a harmful effect on mental health.
4. Eating a lot of fast food is not only unhealthy but also harmful for your body.
5. Prolonged exposure to loud noise can lead to hearing loss and other harmful consequences.
6. The harmful effects of pollution on the environment are becoming more and more evident.
7. Some medications can have harmful side effects, so it is important to consult a doctor before taking them.
8. Cyberbullying can have a very harmful impact on a person's self-esteem and emotional well-being.
9. Drinking too much alcohol is not only harmful to your liver but also to your brain.
10. The harmful chemicals in pesticides can harm not only insects but also other animals and even humans.